--- a/ext/win32/lib/Win32API.rb
+++ b/ext/win32/lib/Win32API.rb
@@ -1,9 +1,6 @@
 # -*- ruby -*-
 # frozen_string_literal: true
 
-# for backward compatibility
-warn "Win32API is deprecated after Ruby 1.9.1; use fiddle directly instead", uplevel: 2
-
 require 'fiddle/import'
 
 class Win32API
